Saw-setting machine.



Patented 0011.26, 1909'.

2 SHEETS-SHEET 1.

i 1 u Q W r R Q \Q. 3 I v I m7 v M A L H. WATKINS. SAW SETTING MACHINE. APPLICATION FILED JULY 10, 1907.

'H. WATKINS.

SAW SETTING MAGHINE.

APPLIGATION IILED JULY 10, 1907.

Patented Oct. 26, 1909.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HARRY WATKINS, OF UTICA, NEW YORK, ASSIGNOR 0F ONE-HALF '10 DELOS DE WOLF SMYTI-I, 0F UTICA, NEW YORK.

SAW-SETTING MACHINE.

Specification of Letters Patent.

Patented Oct. 26, 1909.

Application filed July 10, 1907. Serial No. 382,990.

To all whom it may concern:

Be it known that I, HARRY IVATKINS, of Utica, in the county of Oneida, in the State of New York, have invented new and useful Improvements in Saw-Setting Machines, of which the following, taken in connection with the accompanylng drawings, is a full, clear, and exact description.

This invention relates to certain improvements in saw setting machines and is specifically adapted for setting the teeth of hand-saws. The blades of these saws are usually tapered as distinguished from band saws, scroll saws and hack saws in which the opposite longitudinal edges are substantially parallel and, therefore, may be fed relatively to the saw setting disks as shown in patent to WVatkins and Dye No. 839,909 issued January 1, 1907, also in my pending application No. 328,039, filed July 27, 1906, while in my present application, the taper of the blade makes it necessary to hold it in a fixed position and move the saw setting disk relatively thereto.

It is well known that the teeth intermediate the ends of the saw wear away faster than those at the ends and that after a longer or shorter period of use the longitudinal cutting edge becomes concave or deflected from a straight line and while the main object of my invention is to provide a simple device for setting the teeth of taper saws (particularly hand-saws) I have also sought to provide means whereby the saw setting disks may be shifted transversely of the saw blade simultaneously with its longitudinal movement so as to follow any deflections of the saw teeth from a straight line.

Another object is to provide vertically adjustable saw rests to which the saw is adapted to be clamped and by which the saw teeth may be brought into proper registration with the meeting faces of the saw setting disks.

Other objects and uses will be brought out in the following description.

In the drawings-Figure 1 is a top plan of a saw setting machine embodying the various features of my lnvention. Figs. 2, 3, 4,

and 5 are sectional views taken respectively on lines 2-2, 3-3, 4-4, and

i the cam shaft being omitted in Fig. 2. Fig.

6 is an enlarged elevation of adjacent portions of a saw settlng disk.

In carrying out the objects stated, I pro-1 at one end with a hand-lever 11 5-5, Fig. 1,

vide a main supporting frame consisting in this instance of a horizontal bar -1 of suitable metal adapted to be secured to any available support and provided at its opposite ends with laterally projecting arm 2- having upturned apertured ears 3 in which are secured. transverse studs 4' for supporting a transversely movable frame -5-. As best shown in Fig. 4, this frame 5- is provided near its ends with transverse apertures *6 receiving the lugs or spindles l -5 to be moved transverselythereon for a purpose hereinafter described. This transverse shifting movement of the frame 5 upon the studs 4l is elfected by means of a rock-shaft 7 and one or more eccentrics -8 which play between opposed bearings 9 and 10- on the frame -5-, the rock shaft -7- being provided wherebe manipulated or rocked in either direction to bring the saw setting disks, which are mounted on the frame -5-, into proper registration and engagement with the teeth of the saw.

The ends of the shaft -7 are journaled in suitable bearings -12- on the ends of the main supporting frame 1- and the eccentrics -8- are secured thereto just inside of the bearings 12 and between the bearings -9- and 10 on the frame 5- which is nearly coextensive inlength with the frame 1-. This frame -1 is provided with intermediate laterally projecting hubs or posts -13 spaced some distance apart from each other and from the arms 2-, and support upright threaded studs 14.. Each of these studs 1 1- receives and supports a horizontal arm or saw rest 15- having its upper face disposed in a substantially horizontal plane and is made T-shape in cross section forming a transverse guide for a movable saw-stop or abutment 16 which also carries a saw clamp or screw 17-.

The sliding heads -16--of which there are two, one for each of the arms 15- is formed with lugs 18 underhanging the ways 15 and adapted to be slipped on and off over the outer ends of said ways when desired.

The clamp -17 is engaged with a threaded aperture -19-- in the sliding head 16 and is provided with a suitable handby it may and permitting the frame piece 20 whereby the lower endof the clamp, which is provided with the usual swivel block -22, may be brought into holding engagement with the saw blade as a.

The arm l5 is provided with a clownwardly and rearwardly projecting apertured lug 24 slidable vertically on the screw l4l and rigidly held in its adj usted position by suitable nuts -25 on the screw l4. and engaging respectively the upper and lower faces of the lug 2-l.

The frame 5 is provided at'its opposite ends with upright standards 26 having apertures 27 and '28 arranged in planes one above the other and in which is secured a pair of lengthwise guide rods -30, for supporting and guiding a sliding head or carriage 31. This carriage is, therefore, provided with a pair of lengthwise apertures 32- for the guide rods 30 and is also provided with transverse ward and forward along apertures 33 in which are journaled rotary spindles 3t and -34 carrying similar but opposed saw-setting disks 36 having their meeting faces disposed in substantially the same horizontal plane as the upper face of the arms 15, said disks being rigidly clamped to, their respective shafts by nuts -3S.

It is now clear that the frame 5 is movable transversely of and relatively to the fixed frame -l but is held from endwise movement by being interposed between the upturned lugs or ears 12 or rather by being mounted upon the transverse studs or pins 4L- which are rigid on the frame Secured to the back of the transversely movable frame 5 by suitable fastening means as screws 23 is a lengthwise toothed rack 37 and upon the sliding head or carriage -3l is revolubly mounted a toothed idler or gear 39-, the latter being loosely journaled upon a'stud 40 and is provided with a crank-arm tl-, Figs. 1 and 2, by which it may be rotated.

The toothed rack 37 is nearly coextensive with the length of the frame 5 upon which it is mounted and together with the sliding head or carriage 3l is movable transversely of the frame 2 by means of the rock-shaft 7, eccentrics 8 and hand-piece 1l It is now obvious that by rotating the pinion or idler 89, it, together with the carriage -'31, will be moved bodily backthe rack 37 and guide rods 30 thereby rotating the saw setting disks 86 in engagement with the teeth of the saw a shown by dotted lines in Fig. l and by full lines in section in Fig. 2, it being understood that the idler 39 meshes with the lower gear as 42- which is secured to the shaft -35- and shown in Fig.

meshes. with a similar gear 43 on the upper shaft -34-.

The saw setting disks 36-'which are secured to the shafts 3t and 35- are, therefore, positively driven at the same rate vof speed and are provided with beveled saw setting teeth 43 and intervening spaces 44 which intermesh with each other at their meeting faces to set alternate teeth of the saw in opposite directions as best shown in Fig. 6. r 7

The inner or rear ends of the arms -l5 are connected by a bar 45 which serves the double 15 parallel against rotation about their .upporting studs-ll and also affords additional support forthe saw nearly its entire length and close to the meeting faces of the disks -3(3, the upper face of said bar being coincident with the top faces of the arms l5 and, therefore, in a horizontal plane coincident with the meeting faces of said disks. g

In operation, the sliding head 31 and parts carried thereby are drawn back to one extreme end of its guide rods 30, as

3- bringing the saw setpurpose of holding the arms ting disks -36- beyond the ends of the saw blade whereupon the saw as a is laid fiatwise upon the supporting arms -15 and bar 45- and the latter adjusted by means of the nuts 'Q5 to bring the saw in a horizontal plane coincident with the meeting edges of the disks 36. In this position, the idler 539- is rotated by the crank 4t1 thereby causing the idler and. sliding head 3l to travel. lengthwise of the saw along the rack 37 and guide rods 30 and at the same time rotating the disks 36 along the teeth of the saw causing the teeth 43 of the disks -36- to engage and set alternate saw teeth in opposite directions. Previous to the operation of setting theteeth, however, the'heads 16 are adjusted to bring the lugs 18 against the back edge of the saw after the cutting edge of'said saw has been brought into proper alinement with, the meeting faces of the disks after which the clamps 17 are tightened to hold the saw in place. 7

WVhen the cutting edge of the saw is straight, it is simply necessary to move the carriage 3l back and forth from one ex treme to the other to give the desired set to the saw teeth. If, however, the parts of the cutting edge of the saw are'worn or deflected from a straight line, the saw setting disks may be made to follow such line by proper manipulation of the cams 8- through the medium of the crank-arm l1 and rock-shaft 7 by which operation the frame 5 may be moved transversely upon the guide 4-. It is also evident that by means of this adjustment porting frame, a saw rest mounted on said the saw setting disks may be wedged up a supporting frame along which the carmore firmly against the teeth of the saw in the original adjustment and it also compening movable transversely of the reciprocasates for any slight variation in the alinetory movement of the carriage, rotary saw ment of the cutting edge of the saw out of setting disks mounted on the carriage an arallel with the rack -37. having their peripheries traveling in close \Vhat I claim is: i proximity to each other, a saw support hav- 1. In a saw setting machine, a reciproing a bearing face for the saw disposed in catory carriage, means for guiding the carthe plane of the meeting edges of the disk, riage, means for moving the carriage along and means for adjusting the saw support the guide, a pair of rotary disks mounted on transversely of said plane. the carriage and having intermeshing saw 5. In a saw setting machine, a main supsetting teeth adapted to engage opposite porting frame,a second framemounted upon sides of the teeth of the saw, means for holdand movable transversely of the main frame, ing the saw in the plane of the meeting a carriage mounted upon and movable edges of the disks, and means for registering lengthwise of the second frame, a toothed the teeth of the saw with those of the disks. rack mounted upon and extending length- 2. In a saw setting machine, a reciprowise of the second frame, a rotary pinion catory carriage and guide therefor, means mounted on the carriage and meshing with for reciprocating the carriage along the said rack, means for-rotating the pinion guide, a pair of rotary saw setting disks whereby the carriage is moved lengthwise of mounted on the carriage, means actuated by the second frame and rack, rotary saw setthe first named means for rotating said ting disks on the carriage, means for transdisks, a support for the saw, and meansfor mitting motion from the pinion to the saw adjusting the support to bring the saw in setting disks as the carriage is moved along the plane of the meeting edges of said disk. the second frame, and means for holding the 3. In a saw setting machine, a main supsaw in position to have its teeth engaged by the saw setting disks, and additional means frame, a carriage supporting frame, a carfor moving the second frame and carriage riage mounted on the supporting frame and mounted thereon transversely of the main movable lengthwise thereof, means for reframe. ciprocating the carriage along the support- 1 In witness whereof I have hereunto set my ing frame, separate means for moving the hand this 2nd day of July 1907. carriage transversely of the main frame, saw l HARRY WATKINS setting disks journaled on the carriage, and I means for rotating said disks. WVitnesses:

4:. In a saw setting machine, a recipro- MILDRED M. No'r'r, catory carriage, and driving means therefor, i C. M. MGCORMAGK.

riage is movable, said supporting frame be- 1 

